Exiv2::DateValue Class Reference

Value for simple ISO 8601 dates More...

#include <value.hpp>

Inheritance diagram for Exiv2::DateValue:

Classes
struct	Date
	Simple Date helper structure. More...

Public Types
using	UniquePtr = std::unique_ptr< DateValue >
	Shortcut for a DateValue auto pointer.
Public Types inherited from Exiv2::Value
using	UniquePtr = std::unique_ptr< Value >
	Shortcut for a Value auto pointer.

Public Member Functions
Creators
	DateValue ()
	Default constructor.
	DateValue (int32_t year, int32_t month, int32_t day)
	Constructor.
Manipulators
int	read (const byte *buf, size_t len, ByteOrder byteOrder=invalidByteOrder) override
int	read (const std::string &buf) override
	Set the value to that of the string buf. More...
void	setDate (const Date &src)
	Set the date.
Public Member Functions inherited from Exiv2::Value
	Value (TypeId typeId)
	Constructor, taking a type id to initialize the base class with.
virtual	~Value ()=default
	Virtual destructor.
virtual int	setDataArea (const byte *buf, size_t len)
	Set the data area, if the value has one by copying (cloning) the buffer pointed to by buf. More...
TypeId	typeId () const
	Return the type identifier (Exif data format type).
UniquePtr	clone () const
	Return an auto-pointer to a copy of itself (deep copy). The caller owns this copy and the auto-pointer ensures that it will be deleted.
std::string	toString () const
	Return the value as a string. Implemented in terms of write(std::ostream& os) const of the concrete class.
virtual std::string	toString (size_t n) const
	Return the n-th component of the value as a string. The default implementation returns toString(). The behaviour of this method may be undefined if there is no n-th component.
virtual size_t	sizeDataArea () const
	Return the size of the data area, 0 if there is none.
virtual DataBuf	dataArea () const
	Return a copy of the data area if the value has one. The caller owns this copy and DataBuf ensures that it will be deleted. More...
bool	ok () const
	Check the ok status indicator. After a to<Type> conversion, this indicator shows whether the conversion was successful.

Accessors
UniquePtr	clone () const
size_t	copy (byte *buf, ByteOrder byteOrder=invalidByteOrder) const override
	Write value to a character data buffer. More...
virtual const Date &	getDate () const
	Return date struct containing date information.
size_t	count () const override
	Return the number of components of the value.
size_t	size () const override
	Return the size of the value in bytes.
std::ostream &	write (std::ostream &os) const override
	Write the value to an output stream. You do not usually have to use this function; it is used for the implementation of the output operator for Value, operator<<(std::ostream &os, const Value &value).
int64_t	toInt64 (size_t n=0) const override
	Return the value as a UNIX calendar time converted to int64_t.
uint32_t	toUint32 (size_t n=0) const override
	Return the value as a UNIX calendar time converted to uint32_t.
float	toFloat (size_t n=0) const override
	Return the value as a UNIX calendar time converted to float.
Rational	toRational (size_t n=0) const override
	Return the value as a UNIX calendar time converted to Rational.

Additional Inherited Members
Static Public Member Functions inherited from Exiv2::Value
static UniquePtr	create (TypeId typeId)
	A (simple) factory to create a Value type. More...
Protected Member Functions inherited from Exiv2::Value
	Value (const Value &)=default
Value &	operator= (const Value &)=default
	Assignment operator. Protected so that it can only be used by subclasses but not directly.
Protected Attributes inherited from Exiv2::Value
bool	ok_ {true}
	Indicates the status of the previous to<Type> conversion.

Detailed Description

Value for simple ISO 8601 dates

This class is limited to parsing simple date strings in the ISO 8601 format CCYYMMDD (century, year, month, day).

Member Function Documentation

copy()

size_t Exiv2::DateValue::copy ( byte *  buf, ByteOrder  byteOrder = invalidByteOrder  ) const

overridevirtual

Write value to a character data buffer.

The user must ensure that the buffer has enough memory. Otherwise the call results in undefined behaviour.

Note

The byte order is required by the interface but not used by this method, so just use the default.

Parameters

buf	Data buffer to write to.
byteOrder	Byte order. Not used.

Returns

Number of characters written.

Implements Exiv2::Value.

read() [1/2]

int Exiv2::DateValue::read ( const byte *  buf, size_t  len, ByteOrder  byteOrder = invalidByteOrder  )

overridevirtual

Returns

0 if successful
1 in case of an unsupported date format

Implements Exiv2::Value.

read() [2/2]

int Exiv2::DateValue::read ( const std::string &  buf )

overridevirtual

Set the value to that of the string buf.

Parameters

buf	String containing the date

Returns

0 if successful
1 in case of an unsupported date format

Implements Exiv2::Value.

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The documentation for this class was generated from the following file:

• value.hpp